Heikki Linnakangas wrote:
Gregory Stark wrote:

Conceivably we could grab another infomask bit to indicate "uses new-style varlenas" and then have heaptuple.c understand how to convert them in place.
But that leads to a ton of memory management or page locking problems.

My thinking is that when a page in the old format is read in, it's converted to the new format before doing anything else with it.

Yes, I agree with Heikki. Any other place for conversion will generate a big complexity of maintanace.


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